Process for hydrating lime.



A. M'. SCHOF-IELD.

PROCESS FOR HYDRATING LIME. APPLICATION FILED JAN-3|.1916.

Patented Nov. 14, 1916.

4 SHEETS-SHEET Attornys,

A. M. SCHOFIELD.

PROCESS FOR HYDRATING LIME. APPLICATION FILED JAN-31,1916.

1,204,699. Patented Nov. 14, 1916.

4 SHEE1SSHEEI 2.

.v I \A W g Witnesses A fl j Inventor,

a... I v If by 3 Attorneys.

A. M. SCHOFIELD.

PROCESS FOR HYDRATING LIME.

APPLICATION FILED JAN. 3|. 191a.

Patented Nov. 14, 1916.

4 SHEEIS-SHEET 3.

Witnesses Inventor,

Attorneys,

A. M. SCHOFIELD.

PROCESS FOR HYDRATING LIME.

APPLICATION FILED JAN-31,1916.

Patented Nov. 14, 1916.

4 SHEEISSHEET 4.

- Witnesses Attorneys.

' Anrnun M. scnormnn, or AMHERST, onro.

To all whom it may concern: I Be it known that I, ARTHUR M. Sonormw, a citizen of the United States, residing at Amherst, in'the countyjof Lorain and State of Ohio, have invented anew and useful Process for Hydrating Lime, of which the following. is .a specification. I

The present invention aims to provide a,

I. novel procem for, hydrating lime, and to provide novel means whereby the process may be carried out.

One'.ob]'ect of the present invention isto provide a novel process whereby steam is generated when water is admitted-onto the lime and, more specifically, whereby the heat thus produced, .may' be concentrated and retained at the point where heat is necessary in order. to bring about the best possible 7 results when the water is admitted onto the lime. 1 I

A furtherobject of the invention is to provide a novel process whereby the heat thus generated-may be made 'eliective for any; de

sired pu' se. 1 v

Another object of the invention is to provide a novel process whereby the heat generated in the man'ner hereinbefore may be used for heating the water wh1ch is admitted onto the lime. 4

With the above. and other "objects in 'vi w j whichwill appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention -herein disclosed, can be made within the scope" of what is claimed, without. departing from the spiritof the invention.

In the accompanying drawings: Figure 1 shows in side elevation,.a lime hydrating. apparatus capable of; carrying out the-proc-' ess 'constitutingthe present invention, parts being broken away; Fig. 1s 'a top plan 'of the structure shown in Fig.1; Fig. 3 is a sectional diagrammatic representation of the apparatus whereby the process claimedmay be carried out; Fig. 4; is a cross section taken adjacent the forward end of the container, the parts appearing for .the most part in elevation: Fig; 5 is a fragmental longitudinal section taken along the-line 55 of Fig. 4; Fig. 6 is a section taken approxi mately along the line 6--6 o'fFig. 1; Fig. 7 is a fragmental top plan showing a portion of the means whereby a feeding of-the un- PROCESS FOR HYDRATING-LIME.

Specification of Letters Patent. 7

l Application filed January 31, 1916. Serial No, 75,882."

side elevation of the structure shown in Fig.

7; and Fig.9 is a fragmental vertical sec-' tion showing one of the discharge nozzles whereby water is introduced ontothe un-' slaked lime within the container.

slaked lime is brought about; Fig. a.

To insure aproper carrying out of the. Y

process claimed there is 'provided'a tubular c'ontamer denoted generally by the numeral and embodying an outer shell 2 and an lnner shell 3. The container 1 includes a rear head 4 and a front head 5. The container 1 may beupheld in a-substantially hOIlZOIl'lI-fil position in any manner,

as by supports 6. At 1ts forward end, the container 1 is provided with an inlet 7 for unslakedlime. In

the inlet 7 is journaled a shaft 8 including a" plurality of blades 9. The sides of the-inlet 7 are curved as shownat 16, so as to cooperate with the edges of the blades 9, the

container 1, any appreciable .lealiagei of steam from the interior of the container 1 through themlet 7 will be prevented. The

construction being such that, although the' blades '9 will advance unslaked lime into the inlet 7 ordinarily communicates with a chute 11 adapted to receive the contents of a bin 12 wherein unslaked' lime is stored.

The container 1 is provided, near to its rear end, with a depending outlet 14 in wh ch is ournaIed for rotation ashaft 15 carrying blades'16 adapted to cotiperate with thecurved' sides 17 of outlet, as described in connection with the. blades 9 and inlet 7.

The construction is such that, although the;

slaked lime may pass through outlet 14, any appreciable leakage of steam generated Y within the container 1 will be avoided.

Extended longitudinally of the container 1 is a main shaft 18, the same "being jour naled in the heads 4 and v5 and,if desired,

being journaled on bearings -19 located' within' the container.' Secured tothe main shaft 18 and located within the container 1 are a plurality of sets of blades, three. sets being shown in the present instance. Re A ferring to the' diagrammatic figure 'which is numbered 3, the blades of the first set are second set are denoted by the numerals 21 and 22, and the blades of the third ,set are denoted by Y the numerals 23 and-24. The blades 20 of the first set, that ,is, the set ad-' 'jacent the forward end of the machine, are 4 all so'pitched as to advance the hme when 7 denoted by the numeral 20, the-blades of the the shaft 18 is rotated. The blades 21 of number in each set and the relative arrangement of the blades therein maybe altered,

the frame, by means of a screw 49 cooperatingwith the cross member and the frame. The socket 40 which is carried by the upper end ofthe connecting rod 39 is mounted to swing on the cross member 47.

The lime-feeding mechanism above described may be changed without jeopardizdepending. upon the character of the lime ing the utility of the invention. It is necwhich is being handled. Preferably, how

ever, the blades 20 of the first set are all advancing blades. In the intermediate set, one third of the blades are adapted to advance the material, and two thirds are adapted to retard it. In the last set, that is, theset adjacent the rear end of the machine, one quarter of the blades are pitched to advance the material, and three quarters are pitched to retard the material. These proportions willbe varied in practice, butrepresent a fair average.

The shaft 15 ,which operates the means for sealing the outlet 14 may be connected operatively with the main shaft 18in any desired manner. In the present embodiment of j the invention, a sprocket wheel 25 is secured to the exposed rear end of the shaft 18, a sprocket wheel 26 is secured to 1'29 meshing'intoa gear wheel'30 carried the shaft 15, and, about the sprocket wheels is trained a sprocket chain 65.

. I Any suitable means may be provided for drivingthe shaft 18. If desired,'this driving means may include a shaft 27, journaled in bearings 28 and provided with a pinion a shaft 31 journaled in. bearings 32.

f pinion 33 on the shaft 31 meshes into a gear wheel 34 carried by the main shaft 18, the

main shaft being journaled at its end in a bearing '35 exterior to the container '1.

A means is employed whereby a step-bystep rotation is imparted to shaft 8, to feed the unslaked lime into the container 1. With this end in view,'the shaft 31 is provided as ed to swing on the shaft 8 of the lime feed ing'mechanism, a ratchet wheel 43 being se-' cured to the shaft 8, within the contour of the frame. Mounted to rock in one end of the frame 42 is a shaft 44 carrying a pawl 45 adaptedto coact with the ratchet wheel 43. Assembled with the end ofthe shaft 44 is a weight 46 which serves to maintain pawl 45 in engagement with the ratchet wheel 43.

'A cross member 47 is mounted to move longitudinally of the frame 42, in slots 48 essary merely that there shall be a continuous flow of unslaked lime in proper proportion to the amount of water delivered, and

that the egress of steam be prevented.

Intermediate the ends of the container 1, the walls 2- and 3 thereof are separated by a partition or wall 50, providing adjacent the rear end of the container a water space 52,

and defining adjacent the forward end of shown in Fig. 6. A water inlet 55 for the space 52 is. provided, and he water outlet tmay be in' the form of a pipe 56. The pipe 56 may lead to any point where hot water or steam is desired, but in the present instance,

. the pipe 56 leads to a water storage tank 57,

disposed on top of the limebin 12 or elsev where. The tank 57 is provided with an overflow outlet 58 and leading from the tank is a discharge conduit 59 carrying a regulatsort. The stem of the valve60 mayca'rry a .finger 60 adapted to coiiperatewith a scale 60. The lower endof the conduit 59 communicates with a cross pipe 61 disposed adj acent the head 5 of the container. as shown most clearly in Fig. 4. Projecting from the cross pipe 61 are nipples 62 coiiperating with nozzles 63 (Fig. 9) mountedin'the head 5,

each nozzle being equipped with an outlet 64. The operation of feeding unslaked lime" from the bin 12 into the container 1 is as follows: When thefshaft 31 is rotated, the crank disk 36 and the'wrist pin37 impart a reciprocating movement to the connecting ing and indicating valve 60 of any desired rod 39, the latter tilting the frame 42, where- 'upon pawl 45 will actuate the ratchet wheel 43 and the shaft 8, the blades 9 swinging in close relation to the curved sidewalls 10 of the inlet 7 and admitting the lime in greater or less quantities. In this connection it I should be noted that the blades 9 seal the inlet practically steam-tight, so'that steam generated within the container 1 as hereinafter described may not escape. Two adjustments are provided whereby the throw of the frame 42, and consequently the amount of lime fed into the container 1 may be regulated. One of these adjustments is brought about by rotating the connecting rod 39 which is-threaded into the sockets 38 and 40,

- the effective-length of the connecting'rod 7 thus being changed. This adjustment ordi- I narily is made by the erector' and represents an average adjustment.- A further adjustment may bebrought about by rotating the screw 49, thus to cause the cross member 47 ates in the outlet 14 is driven from the shaft to move toward and away from the axis of the shaft 8, thereby varying" the eflective length of the frame 42. .The adjustment last,

'above described preferably is made by the operator in control of the machine. vThe driving train'for the shaft 18 embodies the; pinion 29, the gear wheel-30, the shaft-31', pinion 33 and the gear wheel 34. As herein before mentioned, the shaft15 which per- I 18' by the sprocket wheel 25, the sprocket I j chain 65 and the sprocket 'wheel 26. Water is delivered onto the unslaked lime at the for-Q ward end of thecontainer 1 by-the pipe 59 I and the nozzles 63. As the lime is thus'slaking, steam and heat are generated. In this connection it isyto'be observed that, adjacent its forward end, the container 1 is surrounded by the heatresisting material 51,- so as to retain the heat. The heat, therefore, is held at a point whereby heat is most necessary, inv

' order to facilitate the chemical reaction be tween the waterand the unslaked lime. As; the lime moves along the bottom of the container 1, throughthe instrumentality of a means, the operation of which will be explained hereinafter, the lime ultimately arrives in the zone surrounded by the water jacket 52. The heat in the lime thus is abstracted, so that, the lime leavesthe machine at a point'app-roximatingas closely as ossible, the temperature of. the surroun atmosphere. l The heat thus abstracted warmsthe water in jacket 52 to a point adjacent or above boiling. 1 When it is recalled that every pound of limewhich is slaked has given ofl 500 British thermal units, or approximately one-horse power, it will be obvious that if the present machine has but alow efliciency, a considerable amount of energy may be saved, to be utilized for any 1 purpose. ,If desired, water heated in" the manner hereinbefore described, may be delivered into the tank 57 and of the pipe '59, onto the unslakedlime.

- As to the manner in whichthe blades '20,

' v 21, 22, and 23 operate on the lime, it will be recalledvthat the. blades 20 are all adapted to advance the lime at the forward end ofthe container 1. and while the lime is in a granular andplastic form, the lime when in this condition requiring the most potent means for advancingit. Owing to the relation ex-.

' isting between the blades 21 and 22 of the in termediate set, the blades 21 being advancing blades and the blades 22 beingretracting or retarding blades, the lime is held as long as necessary in this zone, the general tendency may pass by way of the lime being. to advance, owing to its finely divided condition; When the lime reaches that set'of blades .which' is located adjacent the rear end of the'container, thelime is retarded to a maximum e'xtent, in order that it may remain as long as necessary. within-the zonedefined by the water 1 I jacket 52, so that the heat may be absorbed from the lime and that the lime may leave.

the container 1 in a comparatively cool condition. By a proper manipulation of the valve 60 and by efl'ecting a proper throw f of the frame 42, the amount of water and the amount of lime delivered to the container 1 may be regulated, it being customary in practice to combine the lime and proportion to their chemlcal I thewater p y.- The. operation 'of the structure forming 'the subject matter of this application is practieally'continuous, and the container issealed so that the steam may be maintained therein. The device herein disclosed is so constructed that the heat produced as the lime is slaking may be saved and-may. be applied toany useful purpose, such as" heating the water which is delivered onto the unslaked lime. The container 1 may be pro-. I vided with all of the usual adjun ts, such as manholes 75, a sampler 7 6 and t e like. What is-claimed is:-

1. An improyement-in ing lime commercially, wh ch consists in mingling the lime and water, raising the the process of slak temperature. of an independent body of. 10 0 water by the's'teamproduced by the slaking.

of the lime, and retaining the. steam under pressure .apart from said independent body ofwater. '1- I 2. An improvement in the process of slaking lime commercially, which consists in mingling lime and water, raising the tem-- .perature of an independent body of water by steam produced by the slaking ofthe .lime, l retaining ,thezsteam under pressure apartifrom said independent body of water," and deliveringsaid independent body of:

lime to eflect a slaking of the lime.

3. Anfiniprovement in the process of slaking lime, which consists in mingling water water independently of the steam onto'the and lime in a container; retaining adjacent the intake end of the container, the heat generated by the slaln'ng of the lime; and abstracting adjacent the outletend of the conthe heat generated by the slaking of tainer, the heatgenerated by the slaking of the lime; abstracting adjacent the outlet end of the container, the heat generated by the.

sIak-ingof the lime;fand. regulating the pas sage of the mixture through the container to approximate a. uniform'speed.

5. An improvement in the process of slaking lime, which consists in mingling Water and lime in a container; absorbing adjacent the inlet end of the container, to s1ake the lime, and retaining the heat in the container adjacent the inlet end of the container 4 In testimony that I claim the foregoing as my own, I have hereto afixed my signature in-the presence of two witnesses.

Witnesses:

J. J. Snrr'rnn. T EREsn WAGENER.

ARTHUR M. scnyorinnng 

